Reasons for population growth today are largely due to increase in net migration as it accounted for 2/3 of the increase in population and the increase in life expectancy of average UK person.

Birth Rate

716 000 children were born in 2004

34% fewer births than in 1901

21% fewer than 1971

However the decline in birth rate hasn't been consistent throughout history but has had fluctuated. For example there was a fall iin births during the First World War but an increase postwar with births rising to 1.1 million in 1920. The birth rate fell and remained low before climbing again with another 'baby-boom' after the Second World War. There was also an increase in births in the late 1980s and early 1990s which…